Home › Forums › Angry Birds Transformers Forum › Mission Portals › Reply To: Mission Portals
You don’t necessarily require all three slots to get maximum keys.
I just finished a mission with only two TFs, and once I got the bonus progress from watching the video, I had all five keys to unlock the gift boxes.
This was from the Easy Missions portal and I made sure that I matched up my TFs to the mission-type icon. I forget what the duration was, but it was definitely either a 7h or 12h mission, probably a 12h mission. I was running it with a L10 Ultra Magnus and a L11 Energon Lockdown.
So if you’re short on gems (like I am) you can probably afford to skip the unlocking the second extra TF slot for the time being, unless you really want that 3 x 3 Achievement.